尼古丁参与影响神经系统、呼吸系统和心血管系统等重要器官的发育，并与癌症的发生有着密切的关系。

Not only does nicotine have effect on the development of nerve, respiratory and cardiovascular systems, but has a complex interaction with carcinogenesis.

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近年来，时常发生的严重雾霾令航班延迟，导致普遍的呼吸系统疾病，甚至有报告说，空气污染导致中国居民的寿命缩短数年。

Regular levels of intense smog in recent years have postponed flights, caused widespread respiratory problems and been found to cut years off the lives of the country's citizens.

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这些因素的综合，或造成油罐呼吸不畅，或使呼吸系统堵塞，是油罐发生凹瘪的直接原因。

These factors resulting from impeded breathing and blocking of breathing system are the direct causes for the collapse of oil tanks.

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